From the perspective of supply chain management, game theory is used to construct models for four modes of
warranty service and the service index is also introduced to the analysis. Analysis results show: 1) The manufacturer will
choose the R mode service provided by the retailer regardless of the sensitive index. But the retailer had to balance service
sensitive index relationship between the R and M modes to choose the proper one. 2) When the service sensitive indexes are
equal but not too big. P3-M can gain more market share and more profit. Meanwhile the sensitive indexes are big, R mode is
the best choice for supply chain system.